Safety stop device



May 10. 1927.

J. REID 1528332 SAFETY STD P DEVICE OrizinaI- Filed Feb. 20. 1924 -2Shoots-Sheet 1 a x H lnll l +41 I ,I l l I 4 gmnmtoz ebb! find May 101927. 1,628,332

J. REID SAFETY STOP DEVICE.

Original Filed Feb. 2 1924 2 Shbets-Sheet 2 Patented May 10, 1927.

TUNED STATES I JOHN REID, OF OIL CITY, NSYLVANIA.

' SAFETY STOP DEVICE.

Original application filed February 20, 1924, Serial No. 694,146.Divided and this application filed September 29, 1924. SeriaINo.740,674.

tion of whichofters thepossibility-o-fdisconnecting the governorfromfthethrottle .of the engine with which itis'associated upon thebreaking of the belt,' whereupon in such an emergency the engine will beimmediately brought toa stop. 1 q

- This application is a division of my copending application, Ser. No.694,146, filed February th, 1924.

Other objects ofthe invention as well as the novel featuresofconstruction will be made more apparent as this description proceedsespecially when considered in connection with the accompanying drawingswherein: a

'Fig. 1 is a top plan view .of a speed regulating device constructed-inaccordance with my invention, 1

F ig. 2 is a sectional view taken substantially on the plane indicatedby line 2-2 in F i Fig. 3 is'a sectional view taken substantially on-theplane indicated by line 3-3 in Fig. 1,a'nd v 1 Fig. 4 is a viewtakensubstantially on the plane indicated by line 4-41in Fig; 1.

Referring now more particularly to the drawings wherein likev referencecharacters indicate like parts, it will be noted that there isillustrated a supporting stand or bracket 10 preferably secured to theengine by any suitable means, this stand being formed with a sleeve-likeguiding portion 11 in which there is mounted for reciprocation-a slide12:

formed intermediate its'length with a slot 13 for a purpose to be morefully hereinafter described. l f I Fixed to the stand 10 is a spindle 14this spindle fitting in one end of the sleeve-like portion 11 the standand being secured there in by means of the set screw 15. "A sleevelikebody 16 is mounted upon the spindle 14 and carries a belt-pulleyl''. Theupper end of the member 16 is recessed to accommodate a head 18 formedon the spindle 14'and between this head 18 and the bottom. of the recess there is inserted a thrustbearingltl.

the arms 20. The'outer ends of the springs 24 engage the governor balls25 and tend to normally swing them inwardly toward their axis ofrotation. The tension of the springs 24 may be regulated by the pressureof the pressure block 23 thereon.

Extending centrally of the spindle 14 is a rod 28 having a threadedconnection atone end with a member 29 carrying on its upper end agovernor block 30, the ends of the bell cranks 26. being reduced as at31 whereby a loose connection between these bell-cranks and the governorblock is effected. The governor block is rotatable relative to the shaft29,,there being a thrust bearing 32 interposed between the governorblock and a collar 33 formed on the shaft 29.

The otherend of the rod 28 has a threaded connection as at 34'witl1 theslide 12, a locknut 35 being provided whereby this connection may beadjusted and locked for reasons made apparent hereinafter. The end ofthe slide 12 is bifurcated and'slotted as at 36 to receive the headedend'37 of acontrol rod 38, preferably connected to the throttle or fuelcontrol of the engine. The end of the slide isalso preferably providedwith a stud 39 to which there is connected one end. of a bell-crank 40the other end of which is connected to a control rod 41 for the watervalve of the engine. Therefore as the slide 12 is actuated by thecentrifugal motion imparted to the governor balls 25, the fuel and waterto the engine will also be regulated.

Pivotally mounted as at 42 upon a weblike extension of the stand 10 is alever 43 formed in its free end with an opening 44 adapted to receivethe ball-shaped end 45 of a bell-crank lever 46 pivoted as at 47 to thestand 10. A link 48 is connected to the end of the bell-crank 46, theother end of this link being pivotally connected as at 49 with a'controlwheel 50 mounted upon a stand 51 bolted or secured in any other convenient manner to the engine or engine base.

control wheel 50 is provided "with :1 stop pin 5:3 adapted to engage astop Fill provided on the stand thereby limiting the rotation at thewheel lit). The control wheel 510 may be actuated in any suitablemanner. means preferably being; provided for rotating the wheel itfrom adistantpoint. In the present: illustrative embodiment oi? the inventionthere is shown a cable 5% wound around the wheel, it being obvious thatvarious means may be provided for actuating; the cable to rotate thewheel fill.

The link 41-8 is preteraljily 'lformed oi two sections l8 adjustablycoi'ineeted by means oi slots 415:3 arranged in one oi the sections inwhich cooperate with studs 48" project'- inrr from the other section:ttl, these studs being threaded to receive thumb-nuts d8. lly makingthe connecting;- link .8 adjustable the relative position of the partscan be regulated so that upon operation ot the wheel 50 the governor rod28 and con;--:e quently the slide 12 may be actuated to a greater orless extent.

Resting upon the belt 5?) which passes around the pulley 17 is an idlerpulley 5o carried by an idler pulley lever 57, jourualled in the portion58 or the stand 10. A knock oil dog 59 is provided with a sleevelikeextension (it) which hits over the end of the idler pulley lever 5'? andis secured thereto by means of a set screw (51. The end of the knock oildog; In) is adapted to be under the control rod tit? as illustrated inFigs. 1. and 2.

Obviously should the belt 55 break. the pulley 56 which rests thereonwill fall by gravity thus rotating the portion of the idler pulley lever57 mounted in the bracket as, this rotary motion actuating the dog as tou engage the end of the rod 238 troi'n the forked end 36 oi the slide l2whereupon the governor will be disconnected from the :luel control meansof the engine.

lVhen it is desired to incrase the speed of the engine beyond thatpermitted by the governor the wheel on rotated which in turn willdisplace the link is thus locking the bell-crank lever it; which in turnwill rock the lever l3 about its pivot +2 to displace in a horizontaldirection the slide 12, this movement of the slide tending to open thethrottle to the engine. to thus increase its speed. Obviously the partsmay be maintained in this position as long' as desired; the governorballs being ineti'ertive while the parts are held in this position.Obviously the amount oi displacement at the slide 1:) depends upon theadjustment oi the connecting link -l-S and itwill be 'turt'heri'nore anparent that as the wheel at) rotated to bring the stop pin 52 intoengagement with the stop 53. the wheel 50 and consetpiently the partscontrolled thereby will be locked when it has reached the end of itsadjnst ment owing to the fact that the natural moven'lcnt oi? the linkis downward and ii'irther movement is jnv-zventetl by engage nit-n1 ofthe stops 5%.! ""l.

The slot. til formed in the slide lrl is of :utticlent dimensions topermit a reciprocatEon oi this slide during the normal operation or thegovernor; it being obvious that as the speed of the governor increasesthe balls thereof will swing outwardly by reason oi, the centrifugalaction thus moving the shaft 29 and rod inwardly and dis placing theslide 12 in the direction to cut oil the supply ol tuel to the engine.As mentioned hereinbei'ore the pressure exerted by the springs 12% uponthe governor balls 25 may be regulated by adjusting the pressure block253 by means of the bolt 22.

The provision of the thrust bearings and 32 insures an etlicientoperation 011': the device as obviously the greatest bearing strains areintiparted to the governor at: these points. The length oi? theconnection between the governor balls and the throttle operating rod 3811151 be regulated to insure the proper control of the throttle by theadjustable connection between the rod and the slide 11. the connectionbetween these parts being locked by means of a lock nut 35.

As mentioned hereinbefore the connection between the throttle controlrod 38 and the slide 12 is a readily detachable one and thisdisconnection between these parts is effected each time the pulley belt55 breaks owing to the engagement with the belt of the idler pulley 56which will drop by gravity when unsupported by the belt to thus actuatethe idler pulley lever 57 which in turn, oscillates the knock oti' dog59*tor forcing the end of the rod 38 from engagement with the forked endof the slide 12.

\Vhile one illustrative embodiment (it the invention has been shown anddescribed herein in some detail it will be readily apparent that variousmodifications of the structure may be resorted to without departing fromthe spirit and scope oi? this in: vention and to this end I rest-alivethe right to make such changes in the details oi? this invention as maycome within the purview of the accompanying claims;

Having thus described my inventiom what I claim is:

1. In combination, a governor. a :1lveco11.- trol member a releasableconnection between .aid governor and valve control member, said governorbeing driven l a belt gear ing, an idler pulley associated with saidbeltgearing, said idler pulley being displaceable when said belt gearingbreaks and means operat-ahle bv the displacement of said idler pulleyfor disengaging said releasable con nection between said governor andvalve control member.

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2. In combination, a governor, a valve control rod, a governor slideconnected to said governor, said slide being formed with meansreleasably engaging said valve control rod, a belt gearing for operatingsaid governor, an idler pulley resting upon said belt, a knock off dogconnected to said idler pulley and arranged adjacent the connectionbetween said governor slide and valve control rod, said idlerpullev'being displace- 10 able when said belt breaks whereby said knock01f dog will break the connection between said governor slide and valvecontrol rod.

The foregoing specification signed at Oil City, Pa., this fifth day ofSeptember, 1924.

JOHN REID.

